DFAM Thing

Standalone	Eurorack	Eurorack+

The DFAM Thing is a device that adds significant capabilities to the DFAM (or Edge) sequencer, such as:

• MIDI integration — clocking and individual step play,
• Reset — manual, via CV or via MIDI,
• Variations in the step order — Forward, Reverse, Bounce, Odds & Evens, Shuffle, Random and Custom,
• Changing the sequence length — 1 to 8 steps (up to 16 steps for a custom step order),
• Step repeat — assign a play count of up to 8 times to any step,
• Off-grid timing — swing beat as well as arbitrary programmed shifts.

The Eurorack version supports many of these capabilities in an 8HP module, but with V/Oct CV support in place of MIDI.

The Eurorack Plus version is a newly available upgrade that adds support for MIDI, multistep, microtiming and swing, as well as two additional outputs - Clock and Cycle.

The DFAM Thing Quick Start guide can be found here.

The DFAM Thing Firmware Update guide can be found here.

Major Update

The DFAM-Thing (in future simply the D-Thing since it also supports the Behringer Edge) is now available in a folded aluminium case.

Similarly, the Semi-Modular Thing (henceforth the M-Thing) is ready for sale. See below for details.

Update Apr 29, 2023: I now have a dedicated email address (serendipity.synth@gmail.com) for communication regarding the DFAM Thing or any of my other devices.

Update Mar 9, 2024: New firmware (v1.4) is available for both versions of the D-Thing. For the Standalone device, there is now support for Tap Tempo when using the internal clock. For the Eurorack module, improvements have been made to the timing when running in CV mode.

Update Apr 21, 2024: Firmware v1.5 is now ready and is available for download. With this firmware, all versions have full compatibility with the Behringer Edge. In addition, this update brings some major new capabilities to the Standalone D-Thing: Multistep (ability to repeat any step up to 8 times), Swing beat, and Microtiming (move beats off the grid by up to 33% ahead or behind). See below for more detail.

Update Jun 18, 2024: An expanded Eurorack module, with additional outputs and supporting nearly all of the standalone functions (including MIDI, multistep and microtiming) is now in production. A small number of units are available for purchase. Details are included in the relevant sections below, but I will soon make a demo video and give this module its own documentation page.

Update Oct 7, 2024: The D-Thing works with the Behringer 960 sequencer! See a video here.

Some other items of interest:

• Cherchez la FM: A 4-operator Eurorack FM voice with knob-per-function control.
• Constructive Synthesis: An interactive book for learning synthesis.

Demo

The following video briefly shows the basic functions (using the internal clock).

Eurorack Demo

The Eurorack version is an 8HP module, with V/Oct CV support in place of MIDI, and a dedicated encoder for selecting the number of steps in place of the 8 buttons of the standalone version. Please note that it also does not support functions that rely heavily on the 8 numbered buttons — specifically clock multiply and divide, tap tempo, multistep, microtiming, or allow entry of a custom pattern.

Eurorack Plus

The D-Thing+ Euro is a 12HP module, that includes nearly all the features from the standalone device, while still providing V/Oct CV support, and also including a dedicated Clock output for synchronising with other gear, and a Cycle output that fires at the start of each pattern cycle.

New Features in Firmware 1.5

Swing and Microtiming

Swing timing can be selected using the Control encoder, and is simply toggled on and off. When on, every second step is delayed by 1/3 of a beat.

Microtiming has its own submenu for programming and control. When Microtiming is selected, you can use the submenu to:

• Set: Keep a numbered button pressed and rotate the encoder to set the micro-timing shift for the corresponding step in units of 1/180th of a beat. The maximum deviation is 1/3 late (a positive value) or early (a negative value). Click the encoder while the button is held to return the deviation to zero.

• Clear: Return all steps to 0 deviation.

• Save: Save the current deviations.

• Restore: Restore the last saved deviations.

• Return: Leave the submenu (all settings will remain active).

Here is a demo of these features using the Behringer Edge.

Multistep

Multistep also has its own submenu for programming and control. When Multistep is selected, you can use the submenu to:

• Set: Keep a numbered button pressed and rotate the encoder to set the play count for the corresponding step (from 1 to 8). Click the encoder while the button is held to return the count to 1.

The other options behave in the same way as for Microtiming.

Here is a demo of these features using the Behringer Edge.

Microtiming and Multistepping with the D-Thing+ Euro

The 8HP Eurorack version does not support these extra functions, but the 12HP D-Thing+ does. However, the interface for Microtiming and Multistepping is different due to the lack of the 8 individual step buttons. Instead there is a single LED switch for each.

• When the switch is unlit, the microtiming or multistepping is not applied.
• When the switch is lit, the microtiming or multistepping is applied.
• When the switch is held, it will begin to flash and the display will show the relevant values for each step. Turning the Step encoder will highlight the step values in turn, and turning the control encoder will update the value. A subsequent click of the switch will end this edit mode.
• A long press on the switch when editing will set all steps to their default values.
• Clicking the control encoder while editing will return the selected value to its default (0 for microtiming and 1 for multistepping).
• Programmed values are retained across restarts.

Editing can be carried out either when the setting is active or inactive. If it is active, any changes are immediately applied.

Review

Here is a detailed review of the original version of the DFAM Thing by Melbourne artist Bribery.

Connections

Integrating the DFAM Thing with the DFAM and other gear is via two CV outputs, two CV inputs and a MIDI input. These are all on the right hand side of the device so as to not interfere with operating the controls.

Outputs

• Advance: connect to the ADV/CLOCK input on the DFAM so the DFAM Thing can drive the DFAM sequencer. This is the minimum required connection between the DFAM and the DFAM Thing.
• Run/Stop: optionally connect this output to the DFAM’s RUN/STOP input, so the DFAM Thing can control starting and stopping of the sequencer. However, although a high signal on the DFAM’s RUN/STOP input will start the sequencer, it will not trigger the envelopes, so to make use of this feature you will also need to mult the Advance output of the DFAM Thing to the TRIGGER in on the DFAM. If you setup so the DFAM will start on step 1, the two devices will be in sync with regard to step numbering.
• Alternative Run/Stop: because of the limitation discussed in the previous point, I have added the option to make the Run/Stop output act as a cycle indicator instead, sending a pulse each time the sequencer pattern returns to its starting step. To toggle this option, keep the Control encoder pressed while the unit starts up. To know the current state, look for the ’*’ when the unit reports the firmware version — if present, the alternative mode is enabled.
• Cycle: In the D-Thing+, there is a dedicated Cycle output for this signal.
• Clock (D-Thing+ module only): fires once per step for syncing external gear.

Inputs

• Reset In: a high to this input will cause a reset to (the DFAM Thing’s idea of) step 1.
• Trigger In: when the clocking is external, clock steps are determined by pulses at this input.
• MIDI In: a 5-pin DIN MIDI input for MIDI note, clock & CC messages.

Controls

Clocking the DFAM

Aligning the DFAM and the DFAM Thing

• On startup it is necessary to ensure that the DFAM and the DFAM Thing agree on the first step of a sequence. The easiest way to achieve this is by manually advancing the DFAM sequencer to the first step, rotating the Control encoder until Align Step 1 is displayed, and clicking.

Internal Clock

• When running in this mode, triggers are sent from the Advance output at a rate detemined by the Tempo potentiometer (and shown on the LCD).

External Clock

• When running in this mode, as triggers are received on the Trigger In input, they are passed to the Advance output.

MIDI Clock

• Timing is determined by incoming clock messages over MIDI.
• Start, Stop and Continue messages are used to control the Run state of the DFAM Thing, with Start always beginning from step 1 (according to the DFAM Thing), and Continue from whatever is the current step.
• The MIDI clock input is set to 24 clocks per beat.
• Use of this option is completely independent of the MIDI Mode sequencer option described below.

Clock Multiply and Divide

• When either Internal or MIDI clock is selected, pressing and holding the Control encoder and clicking one of the numbered buttons changes the clock speed as follows:

  1. normal speed,
  2. double speed,
  3. triple speed,
  4. quadruple speed,
  5. normal speed,
  6. half speed,
  7. one third speed,
  8. one quarter speed.

• When a clock factor is applied, the BPM is shown with an asterisk on the display.

• The 8HP Eurorack module does not support this function.

• The 12HP Eurorack module partially supports this function. A long press on the Control encoder will toggle double speed, and a long press on the Steps encoder will toggle half speed.

Playing the DFAM steps

Sequencer modes (patterns)

• Normal: play the steps in order, as per standard DFAM operation,
• Reverse: play the steps in reverse order,
• Bounce: first move through the steps in a forward direction, then bounce back and play them in the reverse direction,
• Odds & Evens: first play just the odd steps in a forward direction, then play just the even steps,
• Shuffle: create a random permutation of the steps, and repeat this particular permutation. A new permutation is created each time this option is selected.
• Random: play a completely random step each beat,
• Custom (Standalone version only): play following a saved sequence of up to 16 steps. A custom sequence is entered by rotating the Control encoder and selecting Save Custom, followed by pressing the numbered buttons as desired to record the corresponding steps.

The number of steps (other than for a custom sequence) can be set to anything from 1 to 8 by clicking the corresponding numbered button. The length chosen is displayed at the top right of the screen.

Other modes

• Multistep (unavailable on the 8HP module): enter the multistep menu (described above).

• Swing (unavailable on the 8HP module): toggle the swing beat.

• Microtiming (unavailable on the 8HP module): enter the microtiming menu (described above).

• Play as Keys (Standalone version only): use the buttons to trigger particular steps when pressed.

• Tap Tempo (Standalone version only): three or more presses of any of the buttons will determine the rate of the Internal clock. Pressing the control encoder a second time, or turning the tempo control will cancel Tap Tempo mode.

• MIDI Mode (unavailable on the 8HP module)/CV Mode (Eurorack modules only)

  • note messages/voltages correspond to specific steps as follows:

    • Any C = step 1
    • Any D = step 2
    • and so on for E, F, G, A, B♭ and B.

  • If the DFAM Thing is running, the selected clock source will determine the triggering of the note, otherwise the note will trigger only when played.

  It is important to note the distinction between MIDI Mode and the MIDI Clock option. MIDI Mode is purely for using note messages to play particular steps on the DFAM sequencer. MIDI Start, Stop and Continue messages will not affect the Run state of the DFAM Thing unless the Clock switch is set to MIDI Clock.

MIDI Control

New in firmware 1.3 of the standalone DFAM Thing is support for MIDI CCs.

• The MIDI CC numbers 16, 17 and 18 control pattern length, pattern type and clock multiplier respectively.
• The DFAM Thing uses the high byte of the control value, so the changes occur at 0, 16, 32, 48 etc. This works better when controlling by a knob, and makes no difference when controlling by computer.
• MIDI CC message support is only available in MIDI clock mode.

What’s that little switch?

Unfortunately the MIDI circuit interferes with programming the Nano via USB, so the small switch is there to disconnect the MIDI circuit when programming the chip. (It also possible of course to remove the chip from the board in order to program it.)

If you accidentally flick the switch (so the actuator is closest to the Nano) then MIDI will not function. This is the first thing to check should MIDI stop working.

The Semi-Modular Thing

The Semi-Modular Thing, in future simply the M-Thing, is a small device designed to work alongside a semi-modular synth (such as the Moog Mother-32, or Arturia Minibrute) and provide additional utilities, modulation sources, and mixing. Now available in a folded aluminium case.

M-Thing Specifications

Here is a step-by-step demonstration of how the M-Thing can add a bit extra to a Mother 32, before playing along with a D-Thing/DFAM pair, then a Matriarch, and finally a Roland System 100.

This demo of the prototype examines the individual functions in more detail.